Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1583Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
3167411.6old
189961617.5old
8589359723.0old
43817441825.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
65800000000157786 / 194238
Estimated T-Level: 64.1
TF below 2^208 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse8F8A1798837DCA284013
Verified2017-10-12kkmrkkblmbrbk8F8A1798837DCA284112613
Verified2020-04-17Oliver Kruse506D4E04FF18A42B4115353
Verified2020-08-12_p95holder_506D4E04FF18A42B495053
Verified (Factored)2022-05-12Jorge Coveiro506D4E04FF18A42B172253
History
DateUserTypeResult
2024-03-01masserNF-PM1
B1=250000000000, B2=1392896430393257790
2022-05-12Jorge CoveiroC-PRP
M1583/3167 : 506D4E04FF18A42B
PRP: Verified (Factored)
PRP without proof (small exponent)
2021-12-16ATHNF-PM1
B1=30000000000, B2=10080814948844640
2021-12-14Oliver KruseNF-PM1
B1=10000000000, B2=7027632638876850
2021-07-22ViliamFNF-PP1
Start=2/7, B1=1000000000, B2=221000000000
2020-08-12_p95holder_C-PRP
M1583/3167/189961/8589359/43817441 : 506D4E04FF18A42B
PRP: Verified (Factored)
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M1583/3167/189961/8589359/43817441 : 506D4E04FF18A42B
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M1583/3167/189961/8589359/43817441 : 8F8A1798837DCA28
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M1583/3167/189961/8589359/43817441 : 8F8A1798837DCA28
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M1583/3167/189961/8589359/43817441 : 8F8A1798837DCA28
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=1000000000, B2=100000000000, E=12